Embedding Fibre Optical Sensors into SLM Parts

Selective Laser Melting (SLM) facilitates the integration of additional functionalities such as sensors into metallic parts. Such sensors can for example be embedded in sections of the parts non accessible after manufacturing. Additionally they can be positioned close to the region of interest. Depending on the type of sensor it is even possible to monitor the structural health of the part itself. This paper discusses the integration of fibre optical sensors into SLM manufactured coupons in a commercial, industry scale, SLM machine. Such systems have merely limited accessibility for fibre handling. The embedment procedure as well as the corresponding bonding quality is explained in detail. Measurement results of the embedded sensor and limitations for the embedding procedure related to the use of commercial SLM systems are presented. Additionally the need for further research is pointed out. ; Mechanical Engineering